
...saying
that you're in a SECRET relationship...
The Big Bang Theory Season 4, Episode 21

The point of a SECRET knock
is to establish a nonverbal signal...
The Big Bang Theory Season 1, Episode 16

He was scared.
He had another SECRET, too.
The Big Bang Theory Season 12, Episode 18

You got to keep moving.
That's the SECRET.
Game of Thrones Season 7, Episode 6

Tell me a SECRET.
Game of Thrones Season 4, Episode 4